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Journal ArticleDOI

The interaction of sodium dodecyl sulfate with gelatin

01 May 1970-Journal of Colloid and Interface Science (Academic Press)-Vol. 33, Iss: 1, pp 16-23
TL;DR: In this article, the surface tension of aqueous SDS/gelatin mixtures was measured at pH 7 and compared with comparable precipitation data obtained at pH 4.1 indicates that the compositions of the complexes formed above and below the isoelectric point are quite similar.
About: This article is published in Journal of Colloid and Interface Science.The article was published on 1970-05-01. It has received 88 citations till now. The article focuses on the topics: Sodium dodecyl sulfate & Gelatin.
Citations
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Journal ArticleDOI
E.D. Goddard1
TL;DR: In this article, the equilibrium surface tension appeared to be solely dependent on the sodium dodecyl sulfate concentration, that is, was independent of that of polylysine, within the limits of the concentrations employed.

511 citations

Journal ArticleDOI
TL;DR: In this paper, an analysis of the solubility diagrams of a cationic hydroxyethyl cellulose derivative, and a homologous series of sodium alkyl sulfates, has provided a value of the adsorption energy, Φ, of these surfactants into the first layer.
Abstract: Polyelectrolytes and oppositely charged surfactants form precipitation complexes which, in many cases, can be completely resolubilized by excess surfactant. In general, maximum precipitation appears to correspond to a single layer of surfactant adsorbed on the polymer, and the resolubilized form to a double layer of surfactant. Prior to formation of the latter, the complexes are highly surface active. An analysis of the solubility diagrams of a cationic hydroxyethyl cellulose derivative, and a homologous series of sodium alkyl sulfates, has provided a value of the adsorption energy, Φ, of these surfactants into the first layer. The value of Φ, viz., 1.1 kT per CH2 group, is somewhat higher than the corresponding value for micelle formation. Studies with a number of surfactants show that polymer/surfactant interaction is most favorable (a) the longer the hydrocarbon chain of the surfactant, (b) the straighter the chain, and (c) when the head group is terminal to the chain. Departures from these conditions reduce the extent of interaction and render difficult resolubilization of the complex. From results on a range of polymers, it is concluded that resolubilization of the precipitated complex is also difficult if the charge density of the polymer is too high.

245 citations

Journal ArticleDOI
E.D Goddard1, R.B Hannan1
TL;DR: In this article, the interaction of a water-soluble cationic substituted cellulose ether with SDS has been examined through a study of precipitation patterns and measurements of surface tension, foaming, and electrophoretic mobility.

226 citations

Journal ArticleDOI
TL;DR: The binding process is shown to be highly cooperative, and it is concluded that the hydrophobic part of the bound surfactant is not completely immersed in the Hydrophobic DNA core, but also interacts with other surfactants molecules.

162 citations

Journal ArticleDOI
TL;DR: In this article, the formation of poly(ethylene oxide)-sodium dodecylsulphate complex was studied by various methods (conductimetry, ionic activity measurement, viscometry, ultracentrifugation) focusing on the influence of polymer molecular weight.

154 citations

References
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Journal ArticleDOI
01 Jan 1967
TL;DR: In this article, the interaction of sodium dodecyl sulfate with polyethylene oxide has been investigated by measurements of conductance, surface tension, and viscosity, and the plots of surface tension and conductance as a function of the SDS concentration show two transition points.
Abstract: The interaction of sodium dodecyl sulfate with polyethylene oxide has been investigated by measurements of conductance, surface tension, and viscosity. The plots of surface tension and conductance as a function of the sodium dodecyl sulfate concentration show two transition points. These results are interpreted in terms of a polymer-surfactant complex or micelle formed by binding between the surfactant ions and the polymer.

436 citations

Journal ArticleDOI
01 Oct 1945
TL;DR: In this article, the authors consider the possibility of reconstructing natural protein fibers into fibers having new and specialized uses, such as yarn, wool, silk, and hair, using synthetic protein fibers.
Abstract: or phosphates, and with methods by which such agents, commonly referred to as detergents, make it possible to manipulate various types of proteins into fibrous forms. The detergents can then be recovered following such manipulation, leaving the regenerated protein in the oriented fibrous state [1, 2]. First, however, we shall consider the reasons for seeking to make fibers from proteins. First of all, the common natural protein fibers have desirable characteristics. VVe find in wool, silk, and hair such properties as warmth, durability, resilience, and high affinity for dyes. It is probable that synthetic protein fibers can be made that have similar desirable characteristics and possibly others not found in the natural fibers. Also, as with cellulose, there is the possibility of developing methods for reconstruction of the natural protein fibers into fibers having new and specialized uses. Another reason why we seek to make fibers from proteins is the abundance of available raw materials. A few are wastes; some have little value; others have moderate or high value. Many of the more common proteins, such as casein, soybean protein, zein, wheat gluten, cottonseed protein, peanut protein, alfalfa protein, chicken feathers, and technical egg white, are being investigated as possible raw materials for synthetic fibers.

61 citations